<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form method="post">
    <label>用户名：</label><input type="text" name="username"><br>
    <label>密码：</label><input type="password" name="password"><br>
    <label>确认密码：</label><input type="password" name="password2"><br>
    <input type="submit" value="提交"><br>
<!--    使用遍历获取闪现的遍历-->
    {% for message in get_flashed_messages() %}
        {{ message }}
    {% endfor %}

</form>

<hr>
<form method="post">
     {{ form.csrf_token() }}
     {{ form.username.label }}{{ form.username }} <br>
     {{ form.password.label }}{{ form.password }} <br>
     {{ form.password2.label }}{{ form.password2 }}<br>
     {{ form.submit }}

</form>

</body>
</html>